Got an older Yamaha that needs some TLC? This Caltric ignition coil set might be just what you're looking for. It includes 2 ignition coils and 4 spark plug caps (boots), designed to work with several Yamaha models from the early '80s. Specifically, it fits the XJ550 Seca (1981-1983), XJ750 Seca, XJ900 Seca, Radian 600, and XS1000—check your bike's details to make sure! The spark plug cap part number is 33510-43010. The coil bolt spacing is 102mm, and the boots have a 90-degree bend with a 5k resistor and threaded terminal posts. Caltric is a big name in powersports parts, so you're getting a reliable replacement. Before you order, it's a good idea to compare the photos to your old coils to ensure a match. A straightforward upgrade to keep your classic Yamaha running smoothly.